Notes on some languages of the western Sudan, including 24 unpublished vocabularies of Barth, extracts from correspondence regarding Richardson's and Barth's expeditions, and a few Hausa riddles and proverbs
Sammlung und Bearbeitung central-afrikanischer Vokabularien der Kanúri-, Téda-, Hausá-, Fulfúlde-, Songai-, Lógone-, Wándalá-, Bágrimma- und Maba-Sprachen / Collection of vocabularies of Central-African languages
Zentralsudanische Studien: Wörterverzeichnisse der deutschen Zentral-Afrika-Expedition 1910/11, nachgelassene Aufnahmen von Gustav Nachtigal und eigene Sammlungen
Travels and discoveries in northern and central Africa, in 1822, 1823 and 1824, by Major Denham, Captain Clapperton, and Doctor Oudney; with a short account of Clapperton's and Lander's second journey in 1825, 1826, and 1827
Narrative of travels and discoveries in northern and central Africa, in the years 1822, 1823 and 1824, extending across the great desert to the tenth degree of northern latitute, and from Kouka in Bornou, to Sackatoo, the capital of the Felatah empire